How do I set the display language and region format for all users and set the company default?

[coatsy35]

Hi,

How do I set the display language to English (United Kingdom) and the region format to English (United Kingdom) for all our existing users? and then change the defaults so that new users have them set automatically?

Basically we keep rolling Power BI reports and things out and users language and display settings are all set as US which ends up displaying dates etc... wrong. Turns out this is the culprit, however they need to go to office.com and  login and then Change your language and timezone. I don't want to have to do this for every user or have to guide them to it. Can I change this via admin for all? and then set defaults so all new users have that set? we are a UK company so would not want anything else. 

Any help appreciated

Regards

[#2]

First set the regional configuration for all mailboxes:
Get-Mailbox –ResultSize Unlimited | Set-MailboxRegionalConfiguration –TimeZone "GMT Standard Time" -Language 2057

[#3]

@coatsy35 

Refer this:

https://learn.microsoft.com/en-us/microsoftteams/change-the-default-language-for-greetings-and-email...